1 /*
   2  * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GCPOLICYCOUNTERS_HPP
  26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_GCPOLICYCOUNTERS_HPP
  27 
  28 #include "runtime/perfData.hpp"
  29 
  30 // GCPolicyCounters is a holder class for performance counters
  31 // that track a generation
  32 
  33 class GCPolicyCounters: public CHeapObj<mtGC> {
  34   friend class VMStructs;
  35 
  36   private:
  37 
  38     // Constant PerfData types don't need to retain a reference.
  39     // However, it's a good idea to document them here.
  40     // PerfStringConstant*     _name;
  41     // PerfStringConstant*     _collector_size;
  42     // PerfStringConstant*     _generation_size;
  43 
  44     PerfVariable*     _tenuring_threshold;
  45     PerfVariable*     _desired_survivor_size;
  46 
  47     const char* _name_space;
  48 
  49  public:
  50 
  51   enum Name {
  52     NONE,
  53     GCPolicyCountersKind,
  54     GCAdaptivePolicyCountersKind,
  55     PSGCAdaptivePolicyCountersKind,
  56     CMSGCAdaptivePolicyCountersKind
  57   };
  58 
  59   GCPolicyCounters(const char* name, int collectors, int generations);
  60 
  61     inline PerfVariable* tenuring_threshold() const  {
  62       return _tenuring_threshold;
  63     }
  64 
  65     inline PerfVariable* desired_survivor_size() const  {
  66       return _desired_survivor_size;
  67     }
  68 
  69     const char* name_space() const { return _name_space; }
  70 
  71     virtual void update_counters() {}
  72 
  73     virtual GCPolicyCounters::Name kind() const {
  74       return GCPolicyCounters::GCPolicyCountersKind;
  75     }
  76 };
  77 
  78 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GCPOLICYCOUNTERS_HPP